S
M
T
W
T
F
S
30
55°
47°
31
54°
46°
1
53°
44°
2
52°
43°
3
52°
46°
4
52°
46°
5
53°
45°
6
52°
45°
7
52°
44°
8
51°
45°
9
53°
44°
10
52°
44°
11
53°
43°
12
52°
43°
13
51°
42°
14
53°
41°
15
53°
41°
16
52°
37°
17
53°
39°
18
50°
41°
19
51°
39°
20
51°
39°
21
50°
38°
22
48°
36°
23
47°
32°
24
45°
34°
25
45°
38°
26
49°
34°
27
49°
36°
28
45°
37°
29
44°
36°
30
47°
36°
1
47°
35°
2
46°
36°
3
46°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mertarvik
Mertarvik's September 2026 forecast shows daily high temperatures ranging from 44° to 55°, with overnight lows between 32° and 47°. The average high for September is 50° with an average low of 40°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Mertarvik. See also: October | November | December.
